Clear plastic cover that resists yellowing.</br>Key lock with inner shelf to prevent tampering. Product Size (WxHxD): 6.06 x 5.06 x 2.63 inches</br>Protects unwanted changes to AC/Heating preferred settings</br>Fits the Honeywell thermostats below and other models measuring 6-Foot x 5-Foot x 1.75-Foot or smaller: RTH8xxxx Family thermostats, RTH7xxxx Family thermostats, RTH6xxxx Family thermostats, RTH5xxxx Family thermostats, CT3x Family thermostats</br></br>Product Description</br></br>The product is easy to use. The product is highly durable and handle. The product is manufactured in United States.</br><br/>http://www.amazon.com/gp/product/B000BPGP6M